Endocrinology and Metabolism

Original Articles

Diabetes, obesity and metabolism Big Data Articles (National Health Insurance Service Database)
The Triglyceride-Glucose Index and Risk of End-Stage Renal Disease across Different Durations of Type 2 Diabetes Mellitus: A Longitudinal Cohort Study: Mi-sook Kim, Kyu-Na Lee, Jeongmin Lee, Jeongeun Kwak, Seung-Hwan Lee, Hyuk-Sang Kwon, Jing Hughes, Kyung-Do Han, Eun Young Lee; Endocrinol Metab. 2025;40(5):718-726. Published online May 19, 2025; DOI: https://doi.org/10.3803/EnM.2024.2271

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Background
This study investigated the association between the triglyceride-glucose (TyG) index, a marker of insulin resistance, and the risk of end-stage renal disease (ESRD) in individuals with type 2 diabetes mellitus (T2DM), focusing on variations by diabetes duration.
Methods
We analyzed 1,219,148 Korean adults with T2DM from National Health Insurance Service data who underwent biennial health evaluations (2015 to 2016). ESRD was defined using specific procedural codes (V codes), and Cox proportional hazard models were employed to estimate hazard ratios (HRs) for ESRD across TyG index quartiles and diabetes duration categories, adjusting for various confounders.
Results
Over 6,967,381 person-years of follow-up, 7,548 participants developed ESRD. Higher TyG index quartiles were independently associated with increased risk of ESRD, which was more pronounced with longer diabetes duration. The adjusted HR for ESRD in the highest TyG quartile (Q4) compared to the lowest quartile (Q1) was 1.235 (95% confidence interval [CI], 0.995 to 1.533) in new-onset diabetes, and 1.592 (95% CI, 1.465 to 1.730) in those with diabetes for ≥10 years. Compared to the lowest TyG quartile in new-onset diabetes, the adjusted HR for ESRD in the highest quartile with diabetes duration ≥10 years increased to 10.239 (95% CI, 8.440 to 12.422). Subgroup analysis revealed that a higher TyG index consistently increased the risk of ESRD, with stronger associations observed in younger individuals and those without comorbidities.
Conclusion
The TyG index is a significant predictor of ESRD in T2DM, particularly in those with prolonged diabetes duration. Targeting insulin resistance early may mitigate the risk of ESRD in this population.

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Association between TYG-BMI index and asthma in adults over 45 years of age: analysis of Global Burden of Disease 2021, China Health and Retirement Longitudinal Study, and National Health and Nutrition Examination Survey data
Zhuolin Qin, Longqian Li, Cheng Wang
Journal of Asthma.2026; 63(2): 214. CrossRef
The Association Between the Triglyceride–Glucose Index and the Risk of Diabetic Kidney Disease in Patients with Type 2 Diabetes Mellitus: A Cross-Sectional Study
Munther S. Momani, Raneem Dalaeen, Dia Sarhan, Zaid Sarhan, Suhib Awamleh, Yazan M. Momani, Omar Abu Farsakh
Life.2026; 16(2): 345. CrossRef

Diabetes, obesity and metabolism Big Data Articles (National Health Insurance Service Database)
Association between the Triglyceride-Glucose Index and Cardiovascular Risk and Mortality across Different Diabetes Durations: A Nationwide Cohort Study: Jeongeun Kwak, Kyung-Do Han, Eun Young Lee, Seung-Hwan Lee, Dong-Jun Lim, Hyuk-Sang Kwon, Jeongmin Lee; Endocrinol Metab. 2025;40(4):548-560. Published online March 5, 2025; DOI: https://doi.org/10.3803/EnM.2024.2205

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Background
We aimed to assess the association between triglyceride-glucose (TyG) index and cardiovascular disease (CVD) risk and mortality in a large cohort of diabetes patients.
Methods
A retrospective cohort study of 1,090,485 participants from the Korean National Health Insurance Service database was conducted. Participants were stratified into TyG quartiles.
Results
Higher TyG index quartiles were significantly associated with an increased CVD risk and mortality risk. In fully adjusted models, participants in the highest TyG quartile (Q4) had an 18% higher risk of CVD (hazard ratio [HR], 1.18; 95% confidence interval [CI], 1.13 to 1.23) and a 16% higher risk of mortality (HR, 1.16; 95% CI, 1.11 to 1.23) compared to those in the lowest quartile (Q1). The association was particularly pronounced in patients with fasting glucose ≥126 mg/dL (CVD [HR, 1.33; 95% CI, 1.29 to 1.37], mortality [HR, 1.23; 95% CI, 1.20 to 1.26]; P for interaction <0.001). Patients with a diabetes duration of ≥10 years showed the strongest association between the TyG index and CVD risk (HR, 1.44; 95% CI, 1.38 to 1.50), while the mortality risk was particularly elevated in those with a diabetes duration of less than 5 years (HR, 1.23; 95% CI, 1.18 to 1.30). Subgroup analyses revealed stronger associations between TyG index and CVD risk in younger participants, non-obese individuals, and non-smokers.
Conclusion
The TyG index is a significant predictor of CVD and mortality in diabetic patients, particularly in those with poor glycemic control or longer disease duration.

Citations

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Preoperative triglyceride–glucose index as a metabolic predictor of surgical site infection after posterior lumbar fusion
Yu Hua, Shaoxing Li, Yuan Jiang, Jinwang Liu
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Combined effect of triglyceride-glucose index and glucose disposal rate on cardio-cerebrovascular disease
Hongfei Yang, Chao Sun, Ya Li, You Zhou, Rui Wang, Yingxue Li, Marwan Salih Al-Nimer
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Miscellaneous
Lipid Variability Induces Endothelial Dysfunction by Increasing Inflammation and Oxidative Stress: Marie Rhee, Joonyub Lee, Eun Young Lee, Kun-Ho Yoon, Seung-Hwan Lee; Endocrinol Metab. 2024;39(3):511-520. Published online May 16, 2024; DOI: https://doi.org/10.3803/EnM.2023.1915

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Background
This study investigates the impact of fluctuating lipid levels on endothelial dysfunction.
Methods
Human aortic and umbilical vein endothelial cells were cultured under varying palmitic acid (PA) concentrations: 0, 50, and 100 μM, and in a variability group alternating between 0 and 100 μM PA every 8 hours for 48 hours. In the lipid variability group, cells were exposed to 100 μM PA during the final 8 hours before analysis. We assessed inflammation using real-time polymerase chain reaction, Western blot, and cytokine enzyme-linked immunosorbent assay (ELISA); reactive oxygen species (ROS) levels with dichlorofluorescin diacetate assay; mitochondrial function through oxygen consumption rates via XF24 flux analyzer; and endothelial cell functionality via wound healing and cell adhesion assays. Cell viability was evaluated using the MTT assay.
Results
Variable PA levels significantly upregulated inflammatory genes and adhesion molecules (Il6, Mcp1, Icam, Vcam, E-selectin, iNos) at both transcriptomic and protein levels in human endothelial cells. Oscillating lipid levels reduced basal respiration, adenosine triphosphate synthesis, and maximal respiration, indicating mitochondrial dysfunction. This lipid variability also elevated ROS levels, contributing to a chronic inflammatory state. Functionally, these changes impaired cell migration and increased monocyte adhesion, and induced endothelial apoptosis, evidenced by reduced cell viability, increased BAX, and decreased BCL2 expression.
Conclusion
Lipid variability induce endothelial dysfunction by elevating inflammation and oxidative stress, providing mechanistic insights into how lipid variability increases cardiovascular risk.

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Diabetes, Obesity and Metabolism
EW-7197 Attenuates the Progression of Diabetic Nephropathy in db/db Mice through Suppression of Fibrogenesis and Inflammation: Kyung Bong Ha, Weerapon Sangartit, Ah Reum Jeong, Eun Soo Lee, Hong Min Kim, Soyeon Shim, Upa Kukongviriyapan, Dae-Kee Kim, Eun Young Lee, Choon Hee Chung; Endocrinol Metab. 2022;37(1):96-111. Published online February 28, 2022; DOI: https://doi.org/10.3803/EnM.2021.1305

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Background
Diabetic nephropathy (DN) is characterized by albuminuria and accumulation of extracellular matrix (ECM) in kidney. Transforming growth factor-β (TGF-β) plays a central role in promoting ECM accumulation. We aimed to examine the effects of EW-7197, an inhibitor of TGF-β type 1 receptor kinase (ALK5), in retarding the progression of DN, both in vivo, using a diabetic mouse model (db/db mice), and in vitro, in podocytes and mesangial cells.
Methods
In vivo study: 8-week-old db/db mice were orally administered EW-7197 at a dose of 5 or 20 mg/kg/day for 10 weeks. Metabolic parameters and renal function were monitored. Glomerular histomorphology and renal protein expression were evaluated by histochemical staining and Western blot analyses, respectively. In vitro study: DN was induced by high glucose (30 mM) in podocytes and TGF-β (2 ng/mL) in mesangial cells. Cells were treated with EW-7197 (500 nM) for 24 hours and the mechanism associated with the attenuation of DN was investigated.
Results
Enhanced albuminuria and glomerular morphohistological changes were observed in db/db compared to that of the nondiabetic (db/m) mice. These alterations were associated with the activation of the TGF-β signaling pathway. Treatment with EW-7197 significantly inhibited TGF-β signaling, inflammation, apoptosis, reactive oxygen species, and endoplasmic reticulum stress in diabetic mice and renal cells.
Conclusion
EW-7197 exhibits renoprotective effect in DN. EW-7197 alleviates renal fibrosis and inflammation in diabetes by inhibiting downstream TGF-β signaling, thereby retarding the progression of DN. Our study supports EW-7197 as a therapeutically beneficial compound to treat DN.

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Diabetes, Obesity and Metabolism
Tetrahydrocurcumin Ameliorates Kidney Injury and High Systolic Blood Pressure in High-Fat Diet-Induced Type 2 Diabetic Mice: Weerapon Sangartit, Kyung Bong Ha, Eun Soo Lee, Hong Min Kim, Upa Kukongviriyapan, Eun Young Lee, Choon Hee Chung; Endocrinol Metab. 2021;36(4):810-822. Published online August 27, 2021; DOI: https://doi.org/10.3803/EnM.2021.988

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Background
Activation of the intrarenal renin-angiotensin system (RAS) is implicated in the pathogenesis of kidney injury and hypertension. We aimed to investigate the protective effect of tetrahydrocurcumin (THU) on intrarenal RAS expression, kidney injury, and systolic blood pressure (SBP) in high-fat diet (HFD)-induced type 2 diabetic mice.
Methods
Eight-week-old male mice were fed a regular diet (RD) or HFD for 12 weeks, and THU (50 or 100 mg/kg/day) was intragastrically administered with HFD. Physiological and metabolic changes were monitored and the expression of RAS components and markers of kidney injury were assessed.
Results
HFD-fed mice exhibited hyperglycemia, insulin resistance, and dyslipidemia compared to those in the RD group (P<0.05). Kidney injury in these mice was indicated by an increase in the ratio of albumin to creatinine, glomerular hypertrophy, and the effacement of podocyte foot processes. Expression of intrarenal angiotensin-converting enzyme, angiotensin II type I receptor, nicotinamide adenine dinucleotide phosphate (NADPH) oxidase-4, and monocyte chemoattractant protein-1 was also markedly increased in HFD-fed mice. HFD-fed mice exhibited elevated SBP that was accompanied by an increase in the wall thickness and vascular cross-sectional area (P<0.05), 12 weeks post-HFD consumption. Treatment with THU (100 mg/kg/day) suppressed intrarenal RAS activation, improved insulin sensitivity, and reduced SBP, thus, attenuating kidney injury in these mice.
Conclusion
THU alleviated kidney injury in mice with HFD-induced type 2 diabetes, possibly by blunting the activation of the intrarenal RAS/nicotinamide adenine dinucleotide phosphate oxidase IV (NOX4)/monocyte chemoattractant protein 1 (MCP-1) axis and by lowering the high SBP.

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Case Reports

1-34 PTH Could Reverse Impaired Bone Mineralization Induced By the Overdose of Bisphosphonate.: Kyeong Hye Park, Kwang Joon Kim, Han Seok Choi, Kyoung Min Kim, Eun Young Lee, Seonhui Han, Hyun Sil Kim, Daham Kim, Hannah Seok, Eun Yeong Choe, Yumie Rhee, Sung Kil Lim; Endocrinol Metab. 2012;27(3):247-250. Published online September 19, 2012; DOI: https://doi.org/10.3803/EnM.2012.27.3.247

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Abstract PDF: Bisphosphonates are the mainstay of osteoporosis treatment. Despite the fact that bisphosphonates have a relatively good safety record and are tolerated well by the majority of patients, serious adverse events have been associated with their use. A 41-year-old man had been diagnosed with osteoporosis and had taken etidronate 200 mg/day daily for 2 years due to the judgmental error. He was referred for the management of refractory bone pain and generalized muscle ache. Serum calcium, phosphate, 25-hydroxy-vitamin D (25(OH)D), and immunoreactive parathyroid hormone (iPTH) were within normal range. Plain X-ray showed multiple fractures. Whole body bone scan confirmed multiple sites of increased bone uptakes. Tetracycline-labeled bone biopsy showed typical findings of osteomalacia. He was diagnosed with iatrogenic, etidronate-induced osteomalacia. The patient received daily parathyroid hormone (PTH) injection for 18 months. PTH effectively reverses impaired bone mineralization caused by etidronate misuse. Currently, he is doing well without bone pain. Bone mineral density significantly increased, and the increased bone uptake was almost normalized after 18 months. This case seems to suggest that human PTH (1-34) therapy, possibly in association with calcium and vitamin D, is associated with important clinical improvements in patients with impaired bone mineralization due to the side effect of bisphosphonate.

A Case of Pituitary Adenoma with Simultaneous Secretion of TSH and GH.: Eun Young Lee, Cheol Ryong Ku, Hyun Min Kim, Woo Kyoung Lee, Jung Soo Lim, Sena Hwang, Do Hwan Kim, Dong Yeob Shin, Eun Jig Lee; Endocrinol Metab. 2011;26(2):160-165. Published online June 1, 2011; DOI: https://doi.org/10.3803/EnM.2011.26.2.160

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Abstract PDF

Thyrotropin (TSH)-secreting pituitary adenoma is a very rare disease. In one-quarter of patients suffering from this disease, the pituitary tumor secretes other anterior pituitary hormones. Herein, we report a case of pituitary adenoma with simultaneous secretion of TSH and growth hormone (GH). A 34-year-old female visitied local hospital complaining of sweating, intermittent palpitation, and weight loss of 8 kg within 1 year. The patient had undergone trans-sphenoidal surgery 3 years prior for resolution of a TSH and GH co-secreting pituitary adenoma. She had been administered somatostatin analogue prior to visiting our hospital. The patient's GH levels were suppressed to below 1 ng/mL on the 75 g oral glucose tolerance test, and her basal insulin-like growth factor-I (IGF-I) level was within normal range. Thyroid function tests demonstrated increased levels of both free thyroxine and TSH. Sella-MRI revealed pituitary adenoma at the floor of the pituitary fossa, approximately 2 cm in height. Therefore, she was diagnosed with residual TSH-secreting pituitary adenoma. The patient again underwent trans-sphenoidal surgery and entered complete remission, based on hormone levels and MRI findings.

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Endoscopic Transsphenoidal Surgery of Pituitary Adenomas: Preliminary Results of the Neurosurgery Service of Hospital Cristo Redentor
Gerson Perondi, Afonso Mariante, Fernando Azambuja, Gabriel Frizon Greggianin, Wanderson William dos Santos Dias, Giulia Pinzetta
Arquivos Brasileiros de Neurocirurgia: Brazilian Neurosurgery.2023; 42(02): e89. CrossRef
A case of a co-secreting TSH and growth hormone pituitary adenoma presenting with a thyroid nodule
Laura Hamilton Adams, Derick Adams
Endocrinology, Diabetes & Metabolism Case Reports.2018;[Epub] CrossRef

Primary Bilateral Adrenal Non-Hodgkin's Lymphoma Presented with Adrenal Insufficiency: A Case Report.: Eun Young Lee, Kyoung Min Kim, Kwang Joon Kim, Songmi Noh, Jin Seok Kim, Woo Ik Yang, Sung Kil Lim; Endocrinol Metab. 2011;26(1):101-105. Published online March 1, 2011; DOI: https://doi.org/10.3803/EnM.2011.26.1.101

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Primary adrenal lymphoma is a very rare disease and it is known to have a poor prognosis. We report here on a case of primary adrenal insufficiency that was secondary to primary bilateral adrenal lymphoma. A 54-year old man was hospitalized because of easy fatigability, weight loss and consistent malaise for 6 months. The physical examination revealed hyperpigmentation on the anterior chest and hypotension. According these findings and symptoms, we did a rapid ACTH stimulation test with a clinical suspicion of adrenal insufficiency. He showed an inadequate adrenal response and so he was diagnosed with adrenal insufficiency. The abdominal CT images showed bilateral huge adrenal masses and increased uptake of the adrenal glands on PET. The pathologic diagnosis by ultrasound-guided gun biopsy of the right adrenal gland was diffuse large B cell lymphoma. The patient was administered combination chemotherapy with the R-CHOP regimen, and after 8-cycles of chemotherapy, he achieved complete remission of tumor according to the image studies and he recovered his adrenal function. Primary adrenal lymphoma, although a rare disease, should be considered in patients with bilateral enlargement of the adrenal glands and when the adrenal glands show increased uptake on a PET scan, and especially there is adrenal insufficiency.

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Systemic vs. intrathecal central nervous system prophylaxis in primary adrenal/renal diffuse large b-cell Lymphoma: A multi-institution retrospective analysis and systematic review
John Xie, Albert Jang, Motohide Uemura, Shigeaki Nakazawa, Teresa Calimeri, Andres JM Ferreri, Shuang R. Chen, Janet L. Schmid, Theresa C. Brown, Francisco Socola, Hana Safah, Nakhle S. Saba
Leukemia Research Reports.2021; 16: 100263. CrossRef

Original Articles

Correlation between Pituitary Insufficiency and Magnetic Resonance Imaging Finding in Non-Functioning Pituitary Adenomas.: Hyun Min Kim, Cheol Ryong Ku, Eun Young Lee, Woo Kyung Lee, Jung Soo Lim, Sena Hwang, Mi Jung Lee, Seung Ku Lee, Sun Ho Kim, Eun Jig Lee; Endocrinol Metab. 2010;25(4):310-315. Published online December 1, 2010; DOI: https://doi.org/10.3803/EnM.2010.25.4.310

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BACKGROUND
Non-functioning pituitary adenomas (NFPAs) are characterized by the absence of clinical and biochemical evidence of pituitary hormone hypersecretion, and these tumors constitute approximately one third of all the tumors of the anterior pituitary. Recently, hormonal deficiencies have gradually evolved to become the leading presenting signs and symptoms in patients with NFPAs. We investigated pituitary hormonal insufficiencies according to the magnetic resonance imaging (MRI) findings in patients with NFPA. METHODS: We evaluated the patients who were newly diagnosed with NFPA from 1997 through 2009. Among them, we analyzed 387 patients who were tested for their combined pituitary function and who underwent MRI. The severity of the hypopituitarism was determined by the number of deficient axes of the pituitary hormones. On the MRI study, the maximal diameter of the tumor, Hardy's classification, the thickness of the pituitary gland and the presence of stalk compression were evaluated. RESULTS: The mean age was 46.85 +/- 12.93 years (range: 15-86) and 186 patients (48.1%) were male. As assessed on MRI, the tumor diameter was 27.87 +/- 9.93 mm, the thickness of the normal pituitary gland was 1.42 +/- 2.07 mm and stalk compression was observed in 201 patients (51.9%). Hypopituitarism was observed in 333 patients (86.0%). Deficiency for each pituitary hormone was most severe in the patients with Hardy type IIIA. Hypopituitarism was severe in the older age patients (P = 0.001) and the patients with a bigger tumor size (P < 0.001) and the presence of stalk compression (P < 0.001). However, the patients who had a thicker pituitary gland showed less severe hypopituitarism (P < 0.001). Multivariate analysis showed that age, tumor diameter and the thickness of pituitary gland were important determinants for pituitary deficiency (P = 0.004, P < 0.001, P = 0.022, respectively). CONCLUSION: The results suggest that the hormonal deficiencies in patient with NFPA were correlated with the MRI findings, and especially the tumor diameter and preservation of the pituitary gland.

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Clinical Parameters to Distinguish Silent Corticotroph Adenomas from Other Nonfunctioning Pituitary Adenomas
Daham Kim, Cheol Ryong Ku, Se Hee Park, Ju Hyung Moon, Eui Hyun Kim, Sun Ho Kim, Eun Jig Lee
World Neurosurgery.2018; 115: e464. CrossRef

p53, p21 and bcl-2 Protein Expressions and the Clinical Significance in Papillary Thyroid Carcinoma.: Tae Sik Jung, Keun Sook Kim, Young Lyun Oh, Jung Hwa Jung, Eun Young Lee, Hye Seung Jung, Yong Ki Min, Myung Shik Lee, Moon Kyu Lee, Kwang Won Kim, Jae Hoon Chung; J Korean Endocr Soc. 2007;22(2):98-104. Published online April 1, 2007; DOI: https://doi.org/10.3803/jkes.2007.22.2.98

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BACKGROUND
There have been some investigations concerning the role of p53, p21 and bcl-2 protein expressions for the tumorigenesis of thyroid cancer. It had been debated that these protein expressions were associated with aggressive features of papillary thyroid carcinoma. We studied to evaluate the prevalence of these protein expressions and their clinical significances in papillary thyroid carcinoma. METHODS: We selected 49 patients with papillary thyroid carcinoma who had been operated on at Samsung Medical Center during the last 10 years. Immunohistochemical staining for p53, p21 and bcl-2 was done by the use of paraffin embedded tissues. We analyzed the results of immunohistochemical staining for p53, p21 and bcl-2 and the correlation with the patients' age, gender, tumor size, multifocality, tumor invasion to both lobes, extrathyroidal invasion, cervical lymph node invasion, distant metastasis and the clinical outcomes. RESULTS: Immunohistochemical staining for p53 was positive in 10 patients (20%), p21 was positive in 36 patients (73%) and bcl-2 was positive in 18 patients (37%). The p53 and bcl-2 expressions were not associated with the clinical parameters. Tumor multifocality and extrathyroidal invasion were significantly higher in the p21 positive group (both P < 0.05). CONCLUSION: This study showed that the p21 protein expression was associated with tumor multifocality and extrathyroidal invasion in the patients with papillary thyroid carcinoma. Immunohistochemical stains for p21 may be used as a parameter for tumor aggressiveness in papillary thyroid carcinoma.

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Clinicopathologic and Diagnostic Significance of p53 Protein Expression in Papillary Thyroid Carcinoma
Mi Kyung Shin, Jeong Won Kim
Asian Pacific Journal of Cancer Prevention.2014; 15(5): 2341. CrossRef

Case Reports

A case of Methimazole-Induced Cholestatic Jaundice With Agranulocytosis.: Sang Gu Kang, Jong Oh Bae, Eun Young Lee, Seong Min Lim, Sang Kun Cho, Ji Hye Kim, Sun Kyung Song; J Korean Endocr Soc. 2005;20(5):519-523. Published online October 1, 2005; DOI: https://doi.org/10.3803/jkes.2005.20.5.519

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Methimazole is a widely used and generally well-tolerated antithyroid agent. Adverse reactions occur in 1~5% of patients taking methimazole medication, but these are most commonly transient, benign leukopenia and a skin rash. Severe cholestatic jaundice, combined with agranulocytosis, has been known as a rare complication. Herein, a case of methimazole induced cholestatic jaundice, with agranulocytosis, is reported.

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A Case Report of Methimazole-Induced Acute Liver Failure Successfully Treated with Liver Transplantation
Sung Jin Jeon, Tae Yong Kim, Seung-Hoon Lee, Jong Sik Kang, Gwang Hyeon Choi, Seung-Gyu Lee, Hee Sang Hwang
Korean Journal of Medicine.2012; 83(3): 363. CrossRef
A Case of Methimazole-induced Pancytopenia: Successful Treatment with Recombinant Human Granulocyte Colony-stimulating Factor
Joo Hyoung Lee, Jihyun Lee, Sang Hun Sung, Sung Hwa Bae, Sang Gyung Kim, Hoon Kyu Oh
Journal of Korean Endocrine Society.2006; 21(6): 548. CrossRef

Upper Airway Obstruction Caused by Intratracheal Ectopic Thyroid Tissue during Pregnancy.: Eun Young Lee, Byung Wan Lee, Jhingook Kim, Sung Jin Bae, Tae Sik Jung, Hye Seung Jung, Yong Ki Min, Myung Shik Lee, Moon Kyu Lee, Kwang Won Kim, Jae Hoon Chung; J Korean Endocr Soc. 2005;20(4):413-420. Published online August 1, 2005; DOI: https://doi.org/10.3803/jkes.2005.20.4.413

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Herein is report an extremely rare case of an intratracheal ectopic thyroid gland related with pregnancy. A 34-year-old woman, in gestational week 11, presented with stridor, progressive dyspnea and a choking sensation during her second pregnancy. Computed tomography of the neck and chest revealed a round intratracheal mass obstructing the airway. A bronchoscopic biopsy with LASER cauterization was performed, and the histological finding revealed normal thyroid tissue. The external thyroid of the patient was evaluated, but only found benign nodules in the thyroid gland. She underwent a segmental resection of the trachea, including the mass and the 1st tracheal cartilage. The histological findings revealed the intratracheal mass to be composed of benign thyroid tissue with nodular hyperplasia. After surgery, no pulmonary symptoms were evident. This case suggested the effect of pregnancy on thyroid tissue stimulatied due to a combination of an increasing human chorionic gonadotropin(hCG) level and relative iodine deficiency during pregnancy. This is the first report on the detection of intratracheal ectopic thyroid tissue during pregnancy in Korea.

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A case of mediastinal ectopic thyroid presenting with a paratracheal mass
Eun Roh, Eun Shil Hong, Hwa Young Ahn, So-Yeon Park, Ho Il Yoon, Kyong Soo Park, Young Joo Park
The Korean Journal of Internal Medicine.2013; 28(3): 361. CrossRef

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